There's a couple of ways to set up the jig, which I'll demonstrate later, so there are a few extra parts.

I marked the legs 10" up from one end. I use a 1/4" drill bit to drill a hole through the two boards. I used a Forstner bit to countersink the head of the carriage bolt. This is the side that will be on the table saw so the bolt must not protrude the surface of the leg.

Install the hinge so the two legs are equal lengths. Make sure you install the hinge pin parallel to the legs so they operate smoothly.

This is one of the methods of attaching the hardware to the legs. One carriage bolt has the flat washer and wing nut while the other has the flat washer, lock washer and the lock nut.

This method allows only one leg to be moved. The lock nut is tightened enough so the adjusting piece does not move.

There's one other piece to add to the jig. I didn't add it yet in this photo because I needed to use the jig for a very large piece.

Cut an extra piece of wood. It's size will depending on the size your jig. I cut mine to @@@@@. This piece is attached to the end of the left leg to act as a lip. The end of the board, which is being tapered, will rest on this piece. The extra piece allows to board to move with the taper jig through the saw blade on the table saw.

The right leg runs along the table saw fence while the left is set at the desired angle.